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P89LPC9211 Datasheet(PDF) 48 Page - NXP Semiconductors

Part # P89LPC9211
Description  8-bit microcontroller with accelerated two-clock 80C51 core 2 kB/4 kB/8 kB 3 V byte-erasable flash with 8-bit ADC
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

P89LPC9211 Datasheet(HTML) 48 Page - NXP Semiconductors

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P89LPC92X1_1
© NXP B.V. 2009. All rights reserved.
Preliminary data sheet
Rev. 01 — 16 April 2009
48 of 74
NXP Semiconductors
P89LPC9201/9211/922A1/9241/9251
8-bit microcontroller with 8-bit ADC
8.3 Block diagram
8.4 Temperature sensor
An on-chip wide-temperature range temperature sensor is integrated. It provides
temperature sensing capability of
−40 °C ~ 85 °C. ADC0 is dedicated for the temperature
sensor, and the temperature sensor is measured through Anin03. To get an accurate
temperature value, it is necessary to get supply voltage by measuring the internal
reference voltage Vref(bg) first. Please see the P89LPC9201/9211/922A1/9241/9251 User
manual for detailed usage of temperature sensor.
8.5 ADC operating modes
8.5.1 Fixed channel, single conversion mode
A single input channel can be selected for conversion. A single conversion will be
performed and the result placed in the result register which corresponds to the selected
input channel. An interrupt, if enabled, will be generated after the conversion completes.
8.5.2 Fixed channel, continuous conversion mode
A single input channel can be selected for continuous conversion. The results of the
conversions will be sequentially placed in the four result register. The user may select
whether an interrupt can be generated after every four conversions. Additional conversion
results will again cycle through the four result register, overwriting the previous results.
Continuous conversions continue until terminated by the user.
Fig 15. ADC block diagram
+
–
comp
8
CONTROL
LOGIC
Vref(bg)
Vsen
+
–
comp
SAR
SAR
8
input MUX
Anin00
Anin01
Anin02
Anin03
Anin10
Anin11
Anin12
Anin13
input MUX
CCLK
002aae432
AD10
AD11
AD12
AD13
2:1 MUX
DAC0
DAC1


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